I PUT A NEW TSTAT IN, NEW COOLANT, STILL NO HEAT. TRUCK HEATS TO 200 DEGREES, LUKE WARM AT BEST AIR. THE BLEND DOOR IS MOVING, SO ITS NOT THAT. ANY IDEAS?

 

Your heater core could be cloged did you get the system flushed when you changed the coolant?

 

Sounds like a plugged heatercore, doesnt take a whole lot to plug em up. What did your fluid look like when changed, was it brown, rusty, clotted in any way. Has anyone added any stopleak products to the radiator? What are the temperature of your lines going into and out of the heatercore, that will tell you pretty much If your core is bad, may be hot going in, but not getting any return.

 

THE COOLANT WAS BROWN. THE LINES GOING IN ARE HOT, THE ONES COMING OUT ARENT ANY WHERE NEAR AS WARM. ILL CHECK IT OUT AND TRY TO FLUSH IT TONIGHT.

 

Sounds like you may have found the problem, let us know.

 

yea flush it or take it to a shop and machine flush it... the machine does a great job .. sucks everything outa there...